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### Question: Who is at highest risk for Meningitis ?
### Response: Bacterium: Neisseria meningitidis is one of the leading causes of bacterial meningitis in children and young adults in the United States. Other bacterium include group B streptococci, haemophilus influenzae, streptococcus pneumoniae, s. pneumoniae, n. meningitidis and mycobacteria. Virus: Mumps, Epstein-Barr virus, herpes simplex viruses, varicella-zoster virus. Fungi: Patinets at higher risk of fungal meningitis include those who have AIDS, leukemia, or other forms of immunodeficient diseases and immunosuppression. Cryptococcus is the most common fungi for these patients. Other fungi caused meningitis include histoplasma and coccidioides. Brain tumor Brain surgery Head injury Systemic lupus erythematosus (Lupus)